Description
Cpanel::JSON::XS before version 4.40 for Perl has an integer buffer overflow causing a segfault when parsing crafted JSON, enabling denial-of-service attacks or other unspecified impact
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| RURBAN | Cpanel::JSON::XS | < 4.40 | 4.40 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | libcpanel-json-xs-perl | 4.39-2 | — |
| Debian 13 | libcpanel-json-xs-perl | 4.39-2~deb13u1 | DSA-6000-1 |
| Debian 12 | libcpanel-json-xs-perl | 4.35-1+deb12u1 | DSA-6000-1 |
| Debian 11 | libcpanel-json-xs-perl | 4.25-1+deb11u1 | DLA-4318-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | libcpanel-json-xs-perl | 4.39-2 | — |
| Ubuntu 25.10 | libcpanel-json-xs-perl | 4.39-2 | — |
| Ubuntu 24.04 LTS | libcpanel-json-xs-perl | 4.37-1ubuntu0.1 | USN-7749-1 |
| Ubuntu 22.04 LTS | libcpanel-json-xs-perl | 4.27-1ubuntu0.2 | USN-7749-1 |
| Ubuntu 20.04 LTS | libcpanel-json-xs-perl | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | libcpanel-json-xs-perl | No fix yet | — |
| Ubuntu 16.04 LTS | libcpanel-json-xs-perl | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | perl-Cpanel-JSON-XS | 4.380.0-150700.3.3.1 | SUSE-SU-2026:4926-1, SUSE-SU-2025:03193-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | perl-Cpanel-JSON-XS | 4.400.0-1.1 | openSUSE-SU-2025:15534-1 |
| openSUSE Leap 16.0 | perl-Cpanel-JSON-XS | 4.420.0-bp160.1.1 | openSUSE-SU-2026:21140-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | perl-cpanel-json-xs | 4.40-r0 | — |
| Alpine v3.23 | perl-cpanel-json-xs | 4.40-r0 | — |
| Alpine v3.22 | perl-cpanel-json-xs | 4.40-r0 | — |
| Alpine v3.21 | perl-cpanel-json-xs | 4.40-r0 | — |
| Alpine v3.20 | perl-cpanel-json-xs | 4.40-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | perl-Cpanel-JSON-XS | 4.25-2.amzn2023.0.7 | ALAS2023-2025-1199 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | perl-Cpanel-JSON-XS | No fix yet | — |
| Azure Linux 2 (CBL-Mariner) | perl-Cpanel-JSON-XS | No fix yet | — |
Advisories 9
- SUSE-SU-2026:4926-1 Security update for perl-Cpanel-JSON-XS SUSE / openSUSE Security Updates · Oct 29, 2026
- openSUSE-SU-2026:21140-1 Security update for perl-Cpanel-JSON-XS SUSE / openSUSE Security Updates · Jun 30, 2026
- WID-SEC-2025-2081 cPanel cPanel/WHM: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Jun 29, 2026
- USN-7749-1 libcpanel-json-xs-perl vulnerability Ubuntu Security Notices (USN) · Apr 27, 2026
- openSUSE-SU-2025:15534-1 perl-Cpanel-JSON-XS-4.400.0-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- DSA-6000-1 libcpanel-json-xs-perl - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2025:03193-1 Security update for perl-Cpanel-JSON-XS SUSE / openSUSE Security Updates · Feb 4, 2026
- DLA-4318-1 libcpanel-json-xs-perl - security update Debian Security (DSA / DLA) · Sep 30, 2025
- ALAS2023-2025-1199 Moderate: perl-Cpanel-JSON-XS security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Sep 29, 2025